UMI Performance

UMI introduces the 2nd Gen F-body & 78-96 B-Body adjustable upper a-arms, offering a perfect balance of performance and street versatility. These a-arms provide enhanced steering precision with added...

Introducing UMI’s 2nd Gen F-body and 78-96 B-Body adjustable upper a-arms – the ultimate combination of race-worthy performance and street-smart versatility. Enjoy improved cornering traction and...

Introducing UMI’s 2nd Gen F-body and 78-96 B-Body adjustable upper a-arms – the ultimate combination of race-worthy performance and street-smart versatility. Enjoy improved cornering traction and...

UMI’s 2nd Gen F-Body upper a-arms are a key component of a great handling muscle car. UMI’s P/N 2653 upper a-arms add caster to improve steering feel and reduce wandering. Strong tubular construction...

UMI’s 2nd Gen F-Body upper a-arms are a key component of a great handling muscle car. UMI’s P/N 2653 upper a-arms add caster to improve steering feel and reduce wandering. Strong tubular construction...

UMI’s 2nd Gen F-Body upper a-arms are a key component of a great handling muscle car. Our P/N 2653-1 upper a-arms add caster to improve steering feel and reduce wandering while incorporating a ½”...

UMI’s 2nd Gen F-Body upper a-arms are a key component of a great handling muscle car. Our P/N 2653-1 upper a-arms add caster to improve steering feel and reduce wandering while incorporating a ½”...

For vehicles with 0-1.5" lowering, Viking's double adjustable rear shocks are designed to significantly enhance your car's performance in various driving conditions. These shocks feature 19...

UMI's Delrin shackle kit works with UMI P/N 2620 rear leaf springs as well as other stock location leaf springs. The kit is a great choice for corner carving street and high performance use. Kit...

UMI's polyurethane shackle kit works with UMI P/N 2620 rear leaf springs as well as other stock location leaf springs. The kit is a great choice for street and performance use. Kit includes bushings...

UMI’s GM A-body bump steer kit for 1971-1972 models is designed to improve handling and straight-line stability by reducing or eliminating toe change during suspension travel, commonly known as “bump...

UMI’s 4060-1 GM A-body bump steer kit (1971-1972) is designed to reduce or eliminate toe change during suspension travel (bump steer). This improves handling, straight line stability, and overall...